Scaling user research has always meant choosing between depth and breadth. Manual interviews deliver rich insight but cost $200-500 per session when accounting for recruiting, scheduling, conducting, transcribing, and analyzing. AI-moderated interviews change this equation: they deliver comparable qualitative depth at 10-20% of the cost and time.
The Scale Problem in User Research
| Cost Component | Manual Interview | AI Interview |
|---|---|---|
| Recruiting and scheduling | $50-100 per participant | Link sharing (no scheduling) |
| Interviewer time | $100-200/hour | $0 (AI conducts) |
| Transcription | $25-50 per session | Automatic |
| Analysis per interview | 2-3 hours | Automatic (themes, quotes) |
| Total cost per interview | $200-500 | $1-3 |
| Total time per interview | 4-6 hours | 15-30 min (review only) |
When AI Interviews Match Human Interviewers
AI interviewers perform well for:
- Structured research with defined questions and probing paths
- Customer feedback where respondents share experiences and opinions
- Discovery research exploring problem spaces and behaviors
- High-volume qualitative where you need 20-100+ conversations
- Consistent methodology where every interview must follow the same framework
When You Still Need a Human
- Sensitive topics requiring empathy and emotional intelligence
- Highly technical domains where the interviewer needs subject matter expertise
- Executive interviews where rapport and status dynamics matter
- Exploratory research in completely uncharted territory
- Prototype testing requiring screen sharing and real-time observation
How to Scale With AI Interviews
Step 1: Convert Your Interview Guide
If you have existing interview questions, convert them instantly:
- Visit koji.so/kojify
- Paste your questions as text
- Koji maps them to interview format with probing
Step 2: Configure Probing Depth
- Set critical questions to 2-3 follow-ups
- Set screening questions to 0-1 follow-ups
- Add custom probing instructions for domain-specific topics
Step 3: Choose Text or Voice
- Text interviews: Best for convenience, async responses
- Voice interviews: Best for depth, natural conversation feel
Step 4: Distribute
- Share the interview link via email, Slack, or embed
- No scheduling needed -- respondents complete at their convenience
- Set capacity limits to control sample size
Step 5: Analyze
- Koji automatically generates per-interview summaries
- Cross-interview theme analysis identifies patterns
- Executive reports synthesize findings with supporting quotes
Getting Started
The fastest path from 0 to scaled research:
- Take an existing survey or interview guide
- Convert it at koji.so/kojify
- Run 10-20 AI interviews as a pilot
- Compare depth and quality to your manual process
- Scale up based on results
